The Convaircar is probably a lot closer to what we
think of as a flying car, because that's exactly what it is. The
Convaircar was an actual road-worthy motor car; it's only major
difference being that it was made out of glassfibre and weighed only
725 lbs. Unlike our earlier examples, which were basically
planes that had detachable wings and tail sections, the Convaircar was
designed to latch an engine/airfoil assembly to its roof. Fly to
your destination, detach the unit, and drive away. No problem.
At least, there wouldn't have been if the prototype of the Convaircar
hadn't pranged into the desert in a fatal crash and the resulting
publicity put paid to the Convaircar's brief career.
Besides, those engine/airfoil assemblies are the
very devil to store in the garage.